Traditional Culture Encyclopedia - Weather inquiry - How to calculate the temperature drop of several degrees in meteorology?

How to calculate the temperature drop of several degrees in meteorology?

One is the difference between the lowest temperature, that is, the difference between the lowest temperature of the previous day or the day and the time when the weather system has the greatest influence (that is, the lowest temperature in the process).

The other is the difference in average temperature. The algorithm is basically the same as above, except for the daily average temperature.